Use of graphs in managing computing environments

ABSTRACT

Resource graphs are provided for use in managing Information Technology environments. The resource graphs include representations of resources of the environment and their relationships.

TECHNICAL FIELD

This invention relates, in general, to managing customer environments to provide support for business resiliency, and in particular, to using resource graphs in the management of such environments.

BACKGROUND OF THE INVENTION

Today, customers attempt to manually manage and align their availability management with their information technology (IT) infrastructure. Changes in either business needs or the underlying infrastructure are often not captured in a timely manner and require considerable rework, leading to an inflexible environment.

Often high availability solutions and disaster recovery technologies are handled via a number of disparate point products that target specific scopes of failure, platforms or applications. Integrating these solutions into an end-to-end solution is a complex task left to the customer, with results being either proprietary and very specific, or unsuccessful.

Customers do not have the tools and infrastructure in place to customize their availability management infrastructure to respond to failures in a way that allows for a more graceful degradation of their environments. As a result, more drastic and costly actions may be taken (such as a site switch) when other options (such as disabling a set of applications or users) could have been offered, depending on business needs.

Coordination across availability management and other systems management disciplines is either nonexistent or accomplished via non-reusable, proprietary, custom technology.

There is little predictability as to whether the desired recovery objective will be achieved, prior to time of failure. There are only manual, labor intensive techniques to connect recovery actions with the business impact of failures and degradations.

Any change in the underlying application, technologies, business recovery objectives, resources or their interrelationships require a manual assessment of impact to the hand-crafted recovery scheme.

SUMMARY OF THE INVENTION

Based on the foregoing, a need exists for a capability to facilitate management of an IT environment. In particular, a need exists for a capability that enables resource relationship information to be captured and managed programmatically, thus, facilitating management of the environment, including, but not limited to, configuration of such environment.

The shortcomings of the prior art are overcome and additional advantages are provided through the provision of a computer-implemented method to facilitate management of an IT environment. The method includes, for instance, providing a resource graph for an IT environment, the resource graph comprising representations of one or more resources of the IT environment and their interrelationships; and using the resource graph to manage one or more aspects of the IT environment.

Computer program products and systems relating to one or more aspects of the present invention are also described and claimed herein.

Additional features and advantages are realized through the techniques of the present invention. Other embodiments and aspects of the invention are described in detail herein and are considered a part of the claimed invention.

BRIEF DESCRIPTION OF THE DRAWINGS

One or more aspects of the present invention are particularly pointed out and distinctly claimed as examples in the claims at the conclusion of the specification. The foregoing and other objects, features, and advantages of the invention are apparent from the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 depicts one embodiment of a processing environment to incorporate and use one or more aspects of the present invention;

FIG. 2 depicts another embodiment of a processing environment to incorporate and use one or more aspects of the present invention;

FIG. 3 depicts yet a further embodiment of a processing environment to incorporate and use one or more aspects of the present invention;

FIG. 4 depicts one embodiment of a Business Resilience System used in accordance with an aspect of the present invention;

FIG. 5A depicts one example of a screen display of a business resilience perspective, in accordance with an aspect of the present invention;

FIG. 5B depicts one example of a screen display of a Recovery Segment, in accordance with an aspect of the present invention;

FIG. 6A depicts one example of a notification view indicating a plurality of notifications, in accordance with an aspect of the present invention;

FIG. 6B depicts one example of a notification message sent to a user, in accordance with an aspect of the present invention;

FIG. 7 depicts one example of a Recovery Segment of the Business Resilience System of FIG. 4, in accordance with an aspect of the present invention;

FIG. 8A depicts examples of key Recovery Time Objective properties for a particular resource, in accordance with an aspect of the present invention;

FIG. 8B depicts one example in which Recovery Time Objective properties collectively form an observation of a Pattern System Environment, in accordance with an aspect of the present invention;

FIG. 9 depicts one embodiment of the logic to create a resource graph, in accordance with an aspect of the present invention;

FIGS. 10A-10C depict one embodiment of the logic to modify a resource graph, in accordance with an aspect of the present invention; and

FIG. 11 depicts one embodiment of a computer program product incorporating one or more aspects of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

In managing a customer's environment, such as its business environment, there is a set of requirements unaddressed by existing technology, which causes unpredictable down time, large impact failures and recoveries, and significant extra labor cost, with resulting loss of business revenue. These requirements include, for instance:

-   -   1. Ensuring that there is a consistent recovery scheme across         the environment, linked to the business application, across the         different types of resources; not a different methodology         performed by platform silo. The recovery is to match the scope         of the business application, not limited in scope to a single         platform. The recovery is to be end-to-end and allow for         interaction across multiple vendor products. In one example, a         business application is defined as a process that is supported         by IT services. It is supportive of the products and/or services         created by a customer. It can be of fine granularity (e.g., a         specific service/product provided) or of coarse granularity         (e.g., a group of services/products provided).     -   2. Ability to group together mixed resource types (servers,         storage, applications, subsystems, network, etc.) into logical         groupings aligned with business processes requirements for         availability.     -   3. Ability to share resources across logical groups of         resources; ability to nest these logical group definitions, with         specifications for goal policy accepted and implemented at each         level.     -   4. Pre-specified recommendations for resource groupings, with         customization possible, and pattern matching customer         configuration with vendor or customer provided         groupings/relationships—to avoid requiring customers to start         from scratch for definitions.     -   5. Ability to group together redundant resources with functional         equivalence—use during validation when customer has less         redundancy than required to meet the Recovery Time Objective         (RTO) goal; in recovery to select an alternate resource for one         that has failed.     -   6. Ability to configure the definition of what constitutes         available, degraded, or unavailable based on customer's own         sensitivity for a given grouping of resources, and business         needs, and further aggregate the state across various resources         to produce an overall state for the business application. The         state is to be assessed real time, based on what is actually         occurring in the system at the time, rather than fixed         definitions. In some cases, a performance slowdown might flag a         degraded environment, and in other cases, a failure may be         necessary before flagging a degraded or unavailable environment.         The definitions of available, degraded and unavailable are to be         consumed by an availability system that evaluates them in the         context of a policy, and then determines appropriate action,         including possibly launching recovery automatically.     -   7. Ability to relate the redundancy capability of relevant         resources to the availability status of a business application.     -   8. Allow customers to configure when recovery actions can be         delegated to lower level resources, particularly since resource         sharing is becoming more relevant in many customer environments.     -   9. Include customer or vendor best practices for availability as         prespecified workflows, expressed in a standards based manner,         that can be customized.     -   10. Ability to specify quantitative business goals for the         recovery of logical groupings of resources, effecting both how         the resources are pre-configured for recovery, as well as         recovered during errors. One such quantitative goal is Recovery         Time Objective (RTO). As part of the specification of         quantitative business goals, to be able to include time bias of         applications, and facilitate the encoding of appropriate         regulatory requirements for handling of certain workloads during         changing business cycles in selected businesses, such as         financial services.     -   11. Decomposition of the overall quantified RTO goal to nested         logical groups; processing for shared groups having different         goals.     -   12. Ability to configure redundancy groupings and co-location         requirements with resources from other vendors, using a         representation for resources (which may be, for example,         standards based), with ability to clearly identify the vendor as         part of the resource definition.     -   13. Ability to use customer's own historical system measures to         automatically generate various system environments, then use         these system environments when specifying quantitative recovery         goals (since recovery time achievability and requirements are         not consistent across time of day, business cycle, etc.). The         function is to be able to incorporate historical information         from dependent resources, as part of the automatic generation of         system environments.     -   14. Specification of statistical thresholds for acceptability of         using historical information; customer specification directly of         expected operation times and directive to use customer specified         values.     -   15. Environments are matched to IT operations and time of day,         with automatic processing under a new system environment at time         boundaries—no automatic internal adjustment of RTO is to be         allowed, rather changed if the customer has specified that a         different RTO is needed for different system environments.     -   16. Goal Validation—Prior to failure time. Ability to see         assessment of achievable recovery time, in, for instance, a         Gantt chart like manner, detailing what is achievable for each         resource and taking into account overlaps of recovery sequences,         and differentiating by system environment. Specific use can be         during risk assessments, management requests for additional         recovery related resources, mitigation plans for where there are         potentials for RTO miss. Example customer questions:         -   What is my expected recovery time for a given application             during “end of month close” system environment?         -   What is the longest component of that recovery time?         -   Can I expect to achieve the desired RTO during the “market             open” for stock exchange or financial services applications?         -   What would be the optimal sequence and parallelization of             recovery for the resources used by my business application?     -   17. Ability to prepare the environment to meet the desired         quantitative business goals, allowing for tradeoffs when shared         resources are involved. Ensure that both automated and         non-automated tasks can be incorporated into the         pre-conditioning. Example of customer question: What would I         need to do for pre-conditioning my system to support the RTO         goal I need to achieve for this business application?

18. Ability to incorporate operations from any vendors'resources for pre-conditioning or recovery workflows, including specification of which pre-conditioning operations have effect on recoveries, which operations have dependencies on others, either within vendor resources or across resources from multiple vendors.

-   -   19. Customer ability to modify pre-conditioning workflows,         consistent with supported operations on resources.     -   20. Ability to undo pre-conditioning actions taken, when there         is a failure to complete a transactionally consistent set of         pre-conditioning actions; recognize the failure, show customers         the optional workflow to undo the actions taken, allow them to         decide preferred technique for reacting to the failure—manual         intervention, running undo set of operations, combination of         both, etc.     -   21. Ability to divide pre-conditioning work between long running         and immediate, nondisruptive short term actions.     -   22. Impact only the smallest set of resources required during         recovery, to avoid negative residual or side effects for         attempting to recover a broader set of resources than what is         actually impacted by the failure.     -   23. Choosing recovery operations based on determination of which         recovery actions address the minimal impact, to meet goal, and         then prepare for subsequent escalation in event of failure of         initial recovery actions.     -   24. Choosing a target for applications and operating systems         (OS), based on customer co-location specifications, redundancy         groups, and realtime system state.     -   25. Ability for customer to indicate specific effect that         recovery of a given business process can have on another         business process—to avoid situations where lower priority         workloads are recovered causing disruption to higher priority         workloads; handling situations where resources are shared.     -   26. Ability to prioritize ongoing recovery processing over         configuration changes to an availability system, and over any         other administration functions required for the availability         system.     -   27. Ability for recoveries and pre-conditioning actions to run         as entire transactions so that partial results are appropriately         accounted for and backed out or compensated, based on actual         effect (e.g., during recovery time or even pre-conditioning, not         all actions may succeed, so need to preserve a consistent         environment).     -   28. Allow for possible non-responsive resources or underlying         infrastructure that does not have known maximum delays in         response time in determining recovery actions, while not going         beyond the allotted recovery time.     -   29. Allow customer to change quantified business recovery         goals/targets without disruption to the existing recovery         capability, with appropriate labeling of version of the policy         to facilitate interaction with change management systems.     -   30. Allow customers to change logical groupings of resources         that have assigned recovery goals, without disruption to the         existing recovery capability, with changes versioned to         facilitate interaction with change management systems.     -   31. Ability to specify customizable human tasks, with time         specifications that can be incorporated into the goal         achievement validation so customers can understand the full time         involved for a recovery and where focusing on IT and people time         is critical to reducing RTO.     -   32. There is a requirement/desire to implement dynamically         modified redundancy groupings for those resources which are high         volume—automatic inclusion based on a specified set of         characteristics and a matching criteria.     -   33. There is a requirement/desire to automatically add/delete         resources from the logical resource groupings for sets of         resources that are not needing individual assessment.

The above set of requirements is addressed, however, by a Business Resiliency (BR) Management System, of which one or more aspects of the present invention are included. The Business Resiliency Management System provides, for instance:

-   -   1. Rapid identification of fault scope.         -   Correlation and identification of dependencies between             business functions and the supporting IT resources.         -   Impact analysis of failures affecting business functions,             across resources used within the business functions,             including the applications and data.         -   Isolation of failure scope to smallest set of resources, to             ensure that any disruptive recovery actions effect only the             necessary resources.     -   2. Rapid granular and graceful degradation of IT service.         -   Discontinuation of services based on business priorities.         -   Selection of alternate resources at various levels may             include selection of hardware, application software, data,             etc.         -   Notifications to allow applications to tailor or reduce             service consumption during times of availability             constraints.     -   3. Integration of availability management with normal business         operations and other core business processes.         -   Policy controls for availability and planned             reconfiguration, aligned with business objectives.         -   Encapsulation, integration of isolated point solutions into             availability IT fabric, through identification of affected             resources and operations initiated by the solutions, as well             as business resiliency.         -   Goal based policy support, associated with Recovery Segments             that may be overlapped or nested in scope.         -   Derivation of data currency requirements, based on business             availability goals.

One goal of the BR system is to allow customers to align their supporting information technology systems with their business goals for handling failures of various scopes, and to offer a continuum of recovery services from finer grained process failures to broader scoped site outages. The BR system is built around the idea of identifying the components that constitute a business function, and identifying successive levels of recovery that lead to more complex constructs as the solution evolves. The various recovery options are connected by an overall BR management capability that is driven by policy controls.

Various characteristics of one embodiment of a BR system include:

-   -   1. Capability for dynamic generation of recovery actions, into a         programmatic and manageable entity.     -   2. Dynamic generation of configuration changes required/desired         to support a customer defined Recovery Time Objective (RTO)         goal.     -   3. Dynamic definition of key Pattern System Environments (PSEs)         through statistical analysis of historical observations.     -   4. Validation of whether requested RTO goals are achievable,         based on observed historical snapshots of outages or customer         specified recovery operation time duration, in the context of         key Pattern System Environments.     -   5. BR system dynamic, automatic generation and use of standards         based Business Process Execution Language (BPEL) workflows to         specify recovery transactions and allow for customer integration         through workflow authoring tools.     -   6. Ability to configure customized scopes of recovery, based on         topologies of resources and their relationships, called Recovery         Segments (RSs).     -   7. Best practice workflows for configuration and recovery,         including, but not limited to, those for different resource         types: servers, storage, network, and middleware, as examples.     -   8. Ability to customize the definition of available, degraded,         unavailable states for Recovery Segments.     -   9. Ability to represent customers'recommended configurations via         best practice templates.     -   10. Ability to define the impact that recovery of one business         application is allowed to have on other business applications.     -   11. Ability to correlate errors from the same or multiple         resources into related outages and perform root cause analysis         prior to initiating recovery actions.     -   12. Quantified policy driven, goal oriented management of         unplanned outages.     -   13. Groupings of IT resources that have associated, consistent         recovery policy and recovery actions, classified as Recovery         Segments.     -   14. Handling of situations where the underlying error detection         and notifications system itself is unavailable.

A Business Resilience System is capable of being incorporated in and used by many types of environments. One example of a processing environment to incorporate and use aspects of a BR system, including one or more aspects of the present invention, is described with reference to FIG. 1.

Processing environment 100 includes, for instance, a central processing unit (CPU) 102 coupled to memory 104 and executing an operating system 106. Examples of operating systems include AIX® and z/OS®, offered by International Business Machines Corporation; Linux; etc. AIX® and z/OS® are registered trademarks of International Business Machines Corporation, Armonk, N.Y., U.S.A. Other names used herein may be registered trademarks, trademarks or product names of International Business Machines Corporation or other companies.

The operating system manages execution of a Business Resilience Runtime Component 108 of a Business Resilience System, described herein, and one or more applications 110 of an application container 112.

As examples, processing environment 100 includes an IBM® System z™ processor or a pSeries® server offered by International Business Machines Corporation; a Linux server; or other servers, processors, etc. Processing environment 100 may include more, less and/or different components than described herein. (pSeries® is a registered trademark of International Business Machines Corporation, Armonk, N.Y., USA.)

Another example of a processing environment to incorporate and use aspects of a BR System, including one or more aspects of the present invention, is described with reference to FIG. 2.

As shown, a processing environment 200 includes for instance, a central processing complex 202 coupled to an input/output (I/O) subsystem 204. Central processing complex 202 includes, for instance, a central processing unit 206, memory 208, an operating system 210, a database management system 212, a Business Resilience Runtime Component 214, an application container 216 including one or more applications 218, and an I/O facility 220.

I/O facility 220 couples central processing complex 202 to I/O subsystem 204 via, for example, a dynamic switch 230. Dynamic switch 230 is coupled to a control unit 232, which is further coupled to one or more I/O devices 234, such as one or more direct access storage devices (DASD).

Processing environments 100 and/or 200 may include, in other embodiments, more, less and/or different components.

In yet another embodiment, a central processing complex 300 (FIG. 3) further includes a network service 302, which is used to couple a central processing complex 300 to a processing environment 304 via a network subsystem 306.

For example, network service 302 of central processing complex 300 is coupled to a switch 308 of network subsystem 306. Switch 308 is coupled to a switch 310 via routers 312 and firewalls 314. Switch 310 is further coupled to a network service 316 of processing environment 304.

Processing environment 304 further includes, for instance, a central processing unit 320, a memory 322, an operating system 324, and an application container 326 including one or more applications 328. In other embodiments, it can include more, less and/or different components.

Moreover, CPC 300 further includes, in one embodiment, a central processing unit 330, a memory 332, an operating system 334, a database management system 336, a Business Resilience Runtime Component 338, an application container 340 including one or more applications 342, and an I/O facility 344. It also may include more, less and/or different components.

I/O facility 344 is coupled to a dynamic switch 346 of an I/O subsystem 347. Dynamic switch 346 is further coupled to a control unit 348, which is coupled to one or more I/O devices 350.

Although examples of various environments are provided herein, these are only examples. Many variations to the above environments are possible and are considered within the scope of the present invention.

In the above-described environments, a Business Resilience Runtime Component of a Business Resilience System is included. Further details associated with a Business Resilience Runtime Component and a Business Resilience System are described with reference to FIG. 4.

In one example, a Business Resilience System 400 is a component that represents the management of recovery operations and configurations across an IT environment. Within that Business Resilience System, there is a Business Resilience Runtime Component (402) that represents the management functionality across multiple distinct Recovery Segments, and provides the service level automation and the support of creation of the recovery sequences. In addition, there are user interface (404), administration (406), installation (408) and configuration template (410) components within the Business Resilience System that enable the administrative operations that are to be performed. Each of these components is described in further detail below.

Business Resilience Runtime Component 402 includes a plurality of components of the BR System that are directly responsible for the collection of observations, creation of PSEs, policy acceptance, validation, error detection, and formulation of recovery sequences. As one example, Business Resilience Runtime Component 402 includes the following components:

-   -   1. One or more Business Resilience Managers (BRM) (412).         -   The Business Resilience Manager (BRM) is the primary             component containing logic to detect potential errors in the             IT environment, perform assessment to find resources causing             errors, and formulate recovery sequences to reestablish the             desired state for resources for all Recovery Segments that             may be impacted.         -   The Business Resilience Manager is a component of which             there can be one or more. It manages a set of Recovery             Segments, and has primary responsibility to formulate             recovery sequences. The association of which Recovery             Segments are managed by a given BRM is determined at             deployment time by the customer, with the help of deployment             time templates. BRMs are primarily responsible for             operations that relate to error handling and recovery             workflow generation, and cross RS interaction.     -   2. One or more Recovery Segments (RS) (414).         -   Recovery Segments are customer-defined groupings of IT             resources to which consistent availability policy is             assigned. In other words, a Recovery Segment acts as a             context within which resource recovery is performed. In many             cases, Recovery Segments are compositions of IT resources             that constitute logical entities, such as a middleware and             its related physical resources, or an “application” and its             related components.         -   There is no presumed granularity of a Recovery Segment.             Customers can choose to specify fine-grained Recovery             Segments, such as one for a given operating system, or a             coarser grained Recovery Segment associated with a business             process and its component parts, or even a site, as             examples.         -   Relationships between IT resources associated with a RS are             those which are part of the IT topology.         -   Recovery Segments can be nested or overlapped. In case of             overlapping Recovery Segments, there can be policy             associated with each RS, and during policy validation,             conflicting definitions are reconciled. Runtime assessment             is also used for policy tradeoff.         -   The Recovery Segment has operations which support policy             expression, validation, decomposition, and assessment of             state.         -   The number of Recovery Segments supported by a BR System can             vary, depending on customer configurations and business             needs.         -   One BRM can manage multiple Recovery Segments, but a given             RS is managed by a single BRM. Further, Recovery Segments             that share resources, or are subset/superset of other             Recovery Segments are managed by the same BRM, in this             example. Multiple BRMs can exist in the environment,             depending on performance, availability, and/or             maintainability characteristics.     -   3. Pattern System Environments (PSEs) (416).         -   Pattern System Environments (PSEs) are representations of a             customer's environment. Sets of observations are clustered             together using available mathematical tooling to generate             the PSEs. In one embodiment, the generation of a PSE is             automatic. A PSE is associated with a given RS, but a PSE             may include information that crosses RSs.         -   As one example, the representation is programmatic in that             it is contained within a structure from which information             can be added/extracted.     -   4. Quantified Recovery Goal (418).         -   A quantified recovery goal, such as a Recovery Time             Objective (RTO), is specified for each Recovery Segment that             a customer creates. If customers have multiple Pattern             System Environments (PSEs), a unique RTO for each PSE             associated with the RS may be specified.     -   5. Containment Region (CR) (420).         -   Containment Region(s) are components of the BR System which             are used at runtime to reflect the scope and impact of an             outage. A Containment Region includes, for instance,             identification for a set of impacted resources, as well as             BR specific information about the failure/degraded state, as             well as proposed recovery. CRs are associated with a set of             impacted resources, and are dynamically constructed by BR in             assessing the error.         -   The original resources reporting degraded availability, as             well as the resources related to those reporting degraded             availability, are identified as part of the Containment             Region. Impacted resources are accumulated into the topology             by traversing the IT relationships and inspecting the             attributes defined to the relationships. The Containment             Region is transitioned to an inactive state after a             successful recovery workflow has completed, and after all             information (or a selected subset in another example) about             the CR has been logged.     -   6. Redundancy Groups (RG) (422).         -   Redundancy Group(s) (422) are components of the BR System             that represent sets of logically equivalent services that             can be used as alternates when a resource experiences             failure or degradation. For example, three instances of a             database may form a redundancy group, if an application             server requires connectivity to one of the set of three, but             does not specify one specific instance.         -   There can be zero or more Redundancy Groups in a BR System.         -   Redundancy Groups also have an associated state that is             maintained in realtime, and can contribute to the definition             of what constitutes available, degraded, or unavailable             states. In addition, Redundancy Groups members are             dynamically and automatically selected by the BR System,             based on availability of the member and co-location             constraints.     -   7. BR Manager Data Table (BRMD) (424).         -   BR maintains specific internal information related to             various resources it manages and each entry in the BR             specific Management Data (BRMD) table represents such a             record of management. Entries in the BRMD represent IT             resources.     -   8. BR Manager Relationship Data Table (BRRD) (426).         -   BR maintains BR specific internal information related to the             pairings of resources it needs to interact with, and each             entry in the BR specific Relationship Data (BRRD) table             represents an instance of such a pairing. The pairing record             identifies the resources that participate in the pairing,             and resources can be any of those that appear in the BRMD             above. The BRRD includes information about the pairings,             which include operation ordering across resources, failure             and degradation impact across resources, constraint             specifications for allowable recovery actions, effect an             operation has on resource state, requirements for resource             to co-locate or anti-co-locate, and effects of preparatory             actions on resources.     -   9. BR Asynchronous Distributor (BRAD) (428).         -   The BR Asynchronous Distributor (BRAD) is used to handle             asynchronous behavior during time critical queries for             resource state and key properties, recovery, and for getting             observations back from resources for the observation log.     -   10. Observation Log (430).         -   The Observation Log captures the information that is             returned through periodic observations of the environment.             The information in the Observation Log is used by cluster             tooling to generate Pattern System Environments (PSE).     -   11. RS Activity Log (432).         -   Each RS has an activity log that represents the RS actions,             successes, failures. Activity logs are internal BR             structures. Primarily, they are used for either problem             determination purposes or at runtime, recovery of failed BR             components. For example, when the RS fails and recovers, it             reads the Activity Log to understand what was in progress at             time of failure, and what needs to be handled in terms of             residuals.     -   12. BRM Activity Log (434).         -   The BRM also has an activity log that represents BRM             actions, success, failures. Activity logs are internal BR             structures.     -   13. Transaction Table (TT) (436).         -   The transaction table is a serialization mechanism used to             house the counts of ongoing recovery and preparatory             operations. It is associated with the RS, and is referred to             as the RS TT.

In addition to the Business Resilience Runtime Component of the BR system, the BR system includes the following components, previously mentioned above.

-   -   User Interface (UI) Component (404).         -   The User interface component is, for instance, a graphical             environment through which the customer's IT staff can make             changes to the BR configuration. As examples: create and             manage Recovery Segments; specify recovery goals; validate             achievability of goals prior to failure time; view and alter             BR generated workflows.         -   The user interface (UI) is used as the primary interface for             configuring BR. It targets roles normally associated with a             Business Analyst, Solution Architect, System Architect, or             Enterprise Architect, as examples.         -   One purpose of the BR UI is to configure the BR resources.             It allows the user to create BR artifacts that are used for             a working BR runtime and also monitors the behaviors and             notifications of these BR resources as they run. In             addition, the BR UI allows interaction with resources in the             environment through, for instance, relationships and their             surfaced properties and operations. The user can add             resources to BR to affect recovery and behaviors of the             runtime environment.         -   The BR UI also surfaces recommendations and best practices             in the form of templates. These are reusable constructs that             present a best practice to the user which can then be             approved and realized by the user.         -   Interaction with the BR UI is based on the typical editor             save lifecycle used within, for instance, the developmental             tool known as Eclipse (available and described at             www.Eclipse.org). The user typically opens or edits an             existing resource, makes modifications, and those             modifications are not persisted back to the resource until             the user saves the editor.         -   Predefined window layouts in Eclipse are called             perspectives. Eclipse views and editors are displayed in             accordance with the perspective's layout, which can be             customized by the user. The BR UI provides a layout as             exemplified in the screen display depicted in FIG. 5A.         -   Screen display 500 depicted in FIG. 5A displays one example             of a Business Resilience Perspective. Starting in the upper             left corner and rotating clockwise, the user interface             includes, for instance:             -   1. Business Resilience View 502             -   This is where the user launches topologies and                 definition templates for viewing and editing.             -   2. Topology/Definition Template Editor 504             -   This is where the editors are launched from the Business                 Resilience View display. The user can have any number of                 editors open at one time.             -   3. Properties View/Topology Resources View/Search View             -   The property and topology resource views are driven off                 the active editor. They display information on the                 currently selected resource and allow the user to modify                 settings within the editor.             -   4. Outline View 508             -   This view provides a small thumbnail of the topology or                 template being displayed in the editor. The user can pan                 around the editor quickly by moving the thumbnail.         -   The topology is reflected by a RS, as shown in the screen             display of FIG. 5B. In FIG. 5B, a Recovery Segment 550 is             depicted, along with a list of one or more topology             resources 552 of the RS (not necessarily shown in the             current view of the RS).         -   In one example, the BR UI is created on the Eclipse Rich             Client Platform (RCP), meaning it has complete control over             the Eclipse environment, window layouts, and overall             behavior. This allows BR to tailor the Eclipse platform and             remove Eclipse artifacts not directly relevant to the BR UI             application, allowing the user to remain focused, while             improving usability.         -   BR extends the basic user interface of Eclipse by creating             software packages called “plugins’ that plug into the core             Eclipse platform architecture to extend its capabilities. By             implementing the UI as a set of standard Eclipse plug-ins,             BR has the flexibility to plug into Eclipse, WebSphere             Integration Developer, or Rational product installs, as             examples. The UI includes two categories of plug-ins, those             that are BR specific and those that are specific to             processing resources in the IT environment. This separation             allows the resource plug-ins to be potentially re-used by             other products.         -   By building upon Eclipse, BR has the option to leverage             other tooling being developed for Eclipse. This is most             apparent in its usage of BPEL workflow tooling, but the             following packages and capabilities are also being             leveraged, in one embodiment, as well:             -   The Eclipse platform provides two graphical toolkit                 packages, GEF and Draw2D, which are used by BR, in one                 example, to render topology displays and handle the                 rather advanced topology layouts and animations. These                 packages are built into the base Eclipse platform and                 provide the foundation for much of the tooling and                 topology user interfaces provided by this design.             -   The Eclipse platform allows building of advanced editors                 and forms, which are being leveraged for BR policy and                 template editing. Much of the common support needed for                 editors, from the common save lifecycle to undo and redo                 support, is provided by Eclipse.             -   The Eclipse platform provides a sophisticated Welcome                 and Help system, which helps introduce and helps users                 to get started configuring their environment. Likewise,                 Eclipse provides a pluggable capability to create task                 instructions, which can be followed step-by-step by the                 user to accomplish common or difficult tasks.     -   BR Admin Mailbox (406) (FIG. 4).         -   The BR Admin (or Administrative) Mailbox is a mechanism used             by various flows of the BR runtime to get requests to an             administrator to take some action. The Admin mailbox             periodically retrieves information from a table, where BR             keeps an up-to-date state.         -   As an example, the Admin Mailbox defines a mechanism where             BR can notify the user of important events needing user             attention or at least user awareness. The notifications are             stored in the BR database so they can be recorded while the             UI is not running and then shown to the user during their             next session.         -   The notifications are presented to the user, in one example,             in their own Eclipse view, which is sorted by date timestamp             to bubble the most recent notifications to the top. An             example of this view is shown in FIG. 6A. As shown, a view             600 is presented that includes messages 602 relating to             resources 604. A date timestamp 606 is also included             therewith.         -   Double clicking a notification opens an editor on the             corresponding resource within the BR UI, which surfaces the             available properties and operations the user may need to             handle the notification.         -   The user is able to configure the UI to notify them whenever             a notification exceeding a certain severity is encountered.             The UI then alerts 650 the user of the notification and             message when it comes in, as shown in FIG. 6B, in one             example.         -   When alerted, the user can choose to open the corresponding             resource directly. If the user selects No, the user can             revisit the message or resource by using the above             notification log view.     -   BR Install Logic (408) (FIG. 4).         -   The BR Install logic initializes the environment through             accessing the set of preconfigured template information and             vendor provided tables containing resource and relationship             information, then applying any customizations initiated by             the user.     -   Availability Configuration Templates (410):         -   Recovery Segment Templates             -   The BR System has a set of Recovery Segment templates                 which represent common patterns of resources and                 relationships. These are patterns matched with each                 individual customer environment to produce                 recommendations for RS definitions to the customer, and                 offer these visually for customization or acceptance.         -   Redundancy Group Templates             -   The BR System has a set of Redundancy Group templates                 which represent common patterns of forming groups of                 redundant resources. These are optionally selected and                 pattern matched with each individual customer                 environment to produce recommendations for RG                 definitions to a customer.         -   BR Manager Deployment Templates             -   The BR System has a set of BR Manager Deployment                 templates which represent recommended configurations for                 deploying the BR Manager, its related Recovery Segments,                 and the related BR management components. There are                 choices for distribution or consolidation of these                 components. Best practice information is combined with                 optimal availability and performance characteristics to                 recommend a configuration, which can then be                 subsequently accepted or altered by the customer.     -   Pairing Templates         -   The BR System has a set of Pairing Templates used to             represent best practice information about which resources             are related to each other.

The user interface, admin mailbox, install logic and/or template components can be part of the same computing unit executing BR Runtime or executed on one or more other distributed computing units.

To further understand the use of some of the above components and their interrelationships, the following example is offered. This example is only offered for clarification purposes and is not meant to be limiting in any way.

Referring to FIG. 7, a Recovery Segment RS 700 is depicted. It is assumed for this Recovery Segment that:

-   -   The Recovery Segment RS has been defined associated with an         instantiated and deployed BR Manager for monitoring and         management.     -   Relationships have been established between the Recovery Segment         RS and the constituent resources 702 a-702 m.     -   A goal policy has been defined and validated for the Recovery         Segment through interactions with the BR UI.     -   The following impact pairings have been assigned to the         resources and relationships:

Rule Resource #1 State Resource #2 State 1 App-A Degraded RS Degraded 2 App-A Unavailable RS Unavailable 3 DB2 Degraded CICS Unavailable 4 CICS Unavailable App-A Unavailable 5 CICS Degraded App-A Degraded 6 OSStorage-1 Unavailable CICS Degraded 7 OSStorage-1 Unavailable Storage Copy Set Degraded 8 DB2 User & Degraded DB2 Degraded Log Data 9 OSStorage-2 Unavailable DB2 User & Log Data Degraded 10 z/OS Unavailable CICS Unavailable 11 z/OS Unavailable DB2 Unavailable 12 Storage Degraded CICS User & Log Degraded Copy Set Data 13 Storage Degraded DB2 User & Log Degraded Copy Set Data

-   -   The rules in the above table correspond to the numbers in the         figure. For instance, #12 (704) corresponds to Rule 12 above.     -   Observation mode for the resources in the Recovery Segment has         been initiated either by the customer or as a result of policy         validation.     -   The environment has been prepared as a result of that goal         policy via policy validation and the possible creation and         execution of a preparatory workflow.     -   The goal policy has been activated for monitoring by BR.

As a result of these conditions leading up to runtime, the following subscriptions have already taken place:

-   -   The BRM has subscribed to runtime state change events for the         RS.     -   RS has subscribed to state change events for the constituent         resources.

These steps highlight one example of an error detection process:

-   -   The OSStorage-1 resource 702 h fails (goes Unavailable).     -   RS gets notified of state change event.     -   1^(st) level state aggregation determines:         -   Storage Copy Set→Degraded         -   CICS User & Log Data→Degraded         -   DB2 User & Log Data→Degraded         -   DB2→Degraded         -   CICS→Unavailable         -   App-A→Unavailable     -   1^(st) level state aggregation determines:         -   RS→Unavailable     -   BRM gets notified of RS state change. Creates the following         Containment Region:

Resource Reason OSStorage-1 Unavailable Storage Copy Set Degraded CICS User & Log Data Degraded DB2 User & Log Data Degraded DB2 Degraded App-A Unavailable CICS Unavailable RS Unavailable

-   -   Creates a recovery workflow based on the following resources:

Resource State OSStorage-1 Unavailable Storage Copy Set Degraded CICS User & Log Data Degraded DB2 User & Log Data Degraded DB2 Degraded App-A Unavailable CICS Unavailable RS Unavailable

In addition to the above, BR includes a set of design points that help in the understanding of the system. These design points include, for instance:

Goal Policy Support

BR is targeted towards goal based policies—the customer configures his target availability goal, and BR determines the preparatory actions and recovery actions to achieve that goal (e.g., automatically).

Availability management of the IT infrastructure through goal based policy is introduced by this design. The BR system includes the ability to author and associate goal based availability policy with the resource Recovery Segments described herein. In addition, support is provided to decompose the goal policy into configuration settings, preparatory actions and runtime procedures in order to execute against the deployed availability goal. In one implementation of the BR system, the Recovery Time Objective (RTO—time to recover post outage) is a supported goal policy. Additional goal policies of data currency (e.g., Recovery Point Objective) and downtime maximums, as well as others, can also be implemented with the BR system. Recovery Segments provide the context for association of goal based availability policies, and are the scope for goal policy expression supported in the BR design. The BR system manages the RTO through an understanding of historical information, metrics, recovery time formulas (if available), and actions that affect the recovery time for IT resources.

RTO goals are specified by the customer at a Recovery Segment level and apportioned to the various component resources grouped within the RS. In one example, RTO goals are expressed as units of time intervals, such as seconds, minutes, and hours. Each RS can have one RTO goal per Pattern System Environment associated with the RS. Based on the metrics available from the IT resources, and based on observed history and/or data from the customer, the RTO goal associated with the RS is evaluated for achievability, taking into account which resources are able to be recovered in parallel.

Based on the RTO for the RS, a set of preparatory actions expressed as a workflow is generated. This preparatory workflow configures the environment or makes alterations in the current configuration, to achieve the RTO goal or to attempt to achieve the goal.

In terms of optimizing RTO, there are tradeoffs associated with the choices that are possible for preparatory and recovery actions. Optimization of recovery choice is performed by BR, and may include interaction at various levels of sophistication with IT resources. In some cases, BR may set specific configuration parameters that are surfaced by the IT resource to align with the stated RTO. In other cases, BR may request that an IT resource itself alter its management functions to achieve some portion of the overall RS RTO. In either case, BR aligns availability management of the IT resources contained in the RS with the stated RTO.

Metrics and Goal Association

In this design, as one example, there is an approach to collecting the required or desired metrics data, both observed and key varying factors, system profile information that is slow or non-moving, as well as potential formulas that reflect a specific resource's use of the key factors in assessing and performing recovery and preparatory actions, historical data and system information. The information and raw metrics that BR uses to perform analysis and RTO projections are expressed as part of the IT resources, as resource properties. BR specific interpretations and results of statistical analysis of key factors correlated to recovery time are kept as BR Specific Management data (BRMD).

Relationships Used by BR, and BR Specific Resource Pairing Information

BR maintains specific information about the BR management of each resource pairing or relationship between resources. Information regarding the BR specific data for a resource pairing is kept by BR, including information such as ordering of operations across resources, impact assessment information, operation effect on availability state, constraint analysis of actions to be performed, effects of preparatory actions on resources, and requirements for resources to co-locate or anti-co-locate.

Evaluation of Failure Scope

One feature of the BR function is the ability to identify the scope and impact of a failure. The BR design uses a Containment Region to identify the resources affected by an incident. The Containment Region is initially formed with a fairly tight restriction on the scope of impact, but is expanded on receiving errors related to the first incident. The impact and scope of the failure is evaluated by traversing the resource relationships, evaluating information on BR specific resource pairing information, and determining most current state of the resources impacted.

Generation and Use of Workflow

Various types of preparatory and recovery processes are formulated and in some cases, optionally initiated. Workflows used by BR are dynamically generated based on, for instance, customer requirements for RTO goal, based on actual scope of failure, and based on any configuration settings customers have set for the BR system.

A workflow includes one or more operations to be performed, such as Start CICS, etc. Each operation takes time to execute and this amount of time is learned based on execution of the workflows, based on historical data in the observation log or from customer specification of execution time for operations. The workflows formalize, in a machine readable, machine editable form, the operations to be performed.

In one example, the processes are generated into Business Process Execution Language (BPEL) compliant workflows with activities that are operations on IT resources or specified manual, human activities. For example, BRM automatically generates the workflows in BPEL. This automatic generation includes invoking routines to insert activities to build the workflow, or forming the activities and building the XML (Extensible Mark-Up Language). Since these workflows are BPEL standard compliant, they can be integrated with other BPEL defined workflows which may incorporate manual activities performed by the operations staff. These BR related workflows are categorized as follows, in one example:

-   -   Preparatory—Steps taken during the policy prepare phase in         support of a given goal, such as the setting of specific         configuration values, or the propagation of availability related         policy on finer grained resources in the Recovery Segment         composition. BR generates preparatory workflows, for instance,         dynamically. Examples of preparatory actions include setting up         storage replication, and starting additional instances of         middleware subsystems to support redundancy.     -   Recovery—Steps taken as a result of fault detection during         runtime monitoring of the environment, such as, for example,         restarting a failed operating system (OS). BR generates recovery         workflows dynamically, in one example, based on the actual         failure rather than a prespecified sequence.     -   Preventive—Steps taken to contain or fence an error condition         and prevent the situation from escalating to a more substantial         outage or impact; for example, the severing of a failed         resource's relationship instances to other resources. Preventive         workflows are also dynamically generated, in one example.     -   Return—Steps taken to restore the environment back to ‘normal         operations’ post recovery, also represented as dynamically         generated workflows, as one example.

Capturing of Workflow Information

Since the set of BR actions described above modify existing IT environments, visibility to the actions that are taken by BR prior to the actual execution is provided. To gain trust in the decisions and recommendations produced by BR, the BR System can run in ‘advisory mode’. As part of advisory mode, the possible actions that would be taken are constructed into a workflow, similar to what would be done to actually execute the processes. The workflows are then made visible through standard workflow authoring tooling for customers to inspect or modify. Examples of BPEL tooling include:

-   -   Bolie, et al., BPEL Cookbook: Best Practices for SOA-based         Integration and Composite Applications Development, ISBN         1904811337, 2006, PACKT Publishing, hereby incorporated herein         by reference in its entirety;     -   Juric, et al., Business Process Execution Language for Web         Services: BPEL and BPEL YWS, ISBN 1-904811-18-3, 2004, PACKT         Publishing, hereby incorporated herein by reference in its         entirety.     -   http://www-306.ibm.com/software/integration/wid/about/?S_CMP=rnav     -   http://www.eclipse.org/bpel/     -   http://www.parasoft.com/jsp/products/home.jsp;jessionid=aaa56iqFywA-HJ?product=BPEL&redname=googbpelm&referred=searchengine%2Fgoogle%Fbpel

Tooling Lifecycle, Support of Managed Resources and Roles

BR tooling spans the availability management lifecycle from definition of business objectives, IT resource selection, availability policy authoring and deployment, development and deployment of runtime monitors, etc. In one example, support for the following is captured in the tooling environment for the BR system:

-   -   Visual presentation of the IT resources & their relationships,         within both an operations and administration context.     -   Configuration and deployment of Recovery Segments and BRMs.     -   Authoring and deployment of a BR policy.     -   Modification of availability configuration or policy changes for         BR.     -   BPEL tooling to support viewing of BR created, as well as         customer authored, workflows.     -   BPEL tooling to support monitoring of workflow status, related         to an operations console view of IT resource operational state.

Policy Lifecycle

The policy lifecycle for BR goal policies, such as RTO goals, includes, for example:

-   -   Define—Policy is specified to a RS, but no action is taken by         the BRM to support the policy (observation information may be         obtained).     -   Validate—Policy is validated for syntax, capability, etc.;         preparatory workflow created for viewing and validation by         customer.     -   Prepare—Preparatory action workflows are optionally executed.     -   Activate—Policy is activated for runtime monitoring of the         environment.     -   Modify—Policy is changed dynamically in runtime.

Configurable State Aggregation

One of the points in determining operational state of a Recovery Segment is that this design allows for customers to configure a definition of specific ‘aggregated’ states, using properties of individual IT resources. A Recovery Segment is an availability management context, in one example, which may include a diverse set of IT resources.

The customer may provide the rules logic used within the Recovery Segment to consume the relevant IT resource properties and determine the overall state of the RS (available, degraded and unavailable, etc). The customer can develop and deploy these rules as part of the Recovery Segment availability policy. For example, if there is a database included in the Recovery Segment, along with the supporting operating system, storage, and network resources, a customer may configure one set of rules that requires that the database must have completed the recovery of in-flight work in order to consider the overall Recovery Segment available. As another example, customers may choose to configure a definition of availability based on transaction rate metrics for a database, so that if the rate falls below some value, the RS is considered unavailable or degraded, and evaluation of ‘failure’ impact will be triggered within the BR system. Using these configurations, customers can tailor both the definitions of availability, as well as the rapidity with which problems are detected, since any IT resource property can be used as input to the aggregation, not just the operational state of IT resources.

Failure During Workflow Sequences of Preparatory, Recovery, Preventive

Failures occurring during sequences of operations executed within a BPEL compliant process workflow are intended to be handled through use of BPEL declared compensation actions, associated with the workflow activities that took a failure. The BR System creates associated “undo” workflows that are then submitted to compensate, and reset the environment to a stable state, based on where in the workflow the failure occurred.

Customer Values

The following set of customer values, as examples, are derived from the BR system functions described above, listed here with supporting technologies from the BR system:

-   -   Align total IT runtime environment to business function         availability objectives:         -   RS definition from representation of IT Resources;         -   Goal (RTO) and action policy specification, validation and             activation; and         -   Tooling by Eclipse, as an example, to integrate with IT             process management.     -   Rapid, flexible, administrative level:         -   Alteration of operation escalation rules;         -   Customization of workflows for preparatory and recovery to             customer goals;         -   Customization of IT resource selection from RG based on             quality of service (QoS);         -   Alteration of definition of IT resource and business             application state (available, degraded, or unavailable);         -   Customization of aggregated state;         -   Modification of topology for RS and RG definition;         -   Selection of BR deployment configuration;         -   Alteration of IT resource recovery metrics;         -   Customization of generated Pattern System Environments; and         -   Specification of statistical tolerances required for system             environment formation or recovery metric usage.     -   Extensible framework for customer and vendor resources:         -   IT resource definitions not specific to BR System; and         -   Industry standard specification of workflows, using, for             instance, BPEL standards.     -   Adaptive to configuration changes and optimization:         -   IT resource lifecycle and relationships dynamically             maintained;         -   System event infrastructure utilized for linkage of IT             resource and BR management;         -   IT resource recovery metrics identified and collected;         -   IT resource recovery metrics used in forming Pattern System             Environments;         -   Learned recovery process effectiveness applied to successive             recovery events;         -   System provided measurement of eventing infrastructure             timing;         -   Dynamic formation of time intervals for aggregation of             related availability events to a root cause; and         -   Distribution of achieved recovery time over constituent             resources.     -   Incremental adoption and coexistence with other availability         offerings:         -   Potential conflict of multiple managers for a resource based             on IT representation;         -   Workflows for recovery and preparatory reflect operations             with meta data linked to existing operations;         -   Advisory mode execution for preparatory and recovery             workflows; and         -   Incremental inclusion of resources of multiple types.     -   Support for resource sharing:         -   Overlapping and contained RS;         -   Merger of CR across RS and escalation of failure scope;

and

-   -   -   Preparatory and recovery workflows built to stringency             requirements over multiple RS.

    -   Extensible formalization of best practices based on industry         standards:         -   Templates and patterns for RS and RG definition;         -   Preparatory and recovery workflows (e.g., BPEL) for             customization, adoption; and         -   Industry standard workflow specifications enabling             integration across customer and multiple vendors.

    -   Integration of business resilience with normal runtime         operations and IT process automation:         -   Option to base on IT system wide, open industry standard             representation of resources;         -   BR infrastructure used for localized recovery within a             system, cluster and across sites; and         -   Utilization of common system infrastructure for events,             resource discovery, workflow processing, visualization.

Management of the IT environment is adaptively performed, as described herein and in a U.S. Patent Application “Adaptive Business Resiliency Computer System for Information Technology Environments,” (POU920070364US1), Bobak et al, co-filed herewith, which is hereby incorporated herein by reference in its entirety.

Many different sequences of activities can be undertaken in creating a BR environment. The following represents one possible sequence; however, many other sequences are possible. This sequence is provided merely to facilitate an understanding of a BR system and one or more aspects of the present invention. This sequence is not meant to be limiting in any way. In the following description, reference is made to various U.S. Patent Applications, which are co-filed herewith.

On receiving the BR and related product offerings, an installation process is undertaken. Subsequent to installation of the products, a BR administrator may define the configuration for BR manager instances with the aid of BRM configuration templates.

Having defined the BRM configuration a next step could be to define Recovery Segments as described in “Recovery Segments for Computer Business Applications,” (POU920070108US1), Bobak et al., which is hereby incorporated herein by reference in its entirety.

Definition of a RS may use a representation of resources in a topology graph as described herein, in accordance with one or more aspects of the present invention.

It is expected that customers will enable BR operation in “observation” mode for a period of time to gather information regarding key metrics and operation execution duration associated with resources in a RS.

At some point, sufficient observation data will have been gathered or a customer may have sufficient knowledge of the environment to be managed by BR. A series of activities may then be undertaken to prepare the RS for availability management by BR. As one example, the following steps may be performed iteratively.

A set of functionally equivalent resources may be defined as described in “Use of Redundancy Groups in Runtime Computer Management of Business Applications,” (POU920070113US1), Bobak et al., which is hereby incorporated herein by reference in its entirety.

Specification of the availability state for individual resources, redundancy groups and Recovery Segments may be performed as described in “Use of Multi-Level State Assessment in Computer Business Environments,” (POU920070114US1), Bobak et al., which is hereby incorporated herein by reference in its entirety.

Representations for the IT environment in which BR is to operate may be created from historical information captured during observation mode, as described in “Computer Pattern System Environment Supporting Business Resiliency,” (POU920070107US1), Bobak et al., which is hereby incorporated herein by reference in its entirety. These definitions provide the context for understanding how long it takes to perform operations which change the configuration—especially during recovery periods.

Information on relationships between resources may be specified based on recommended best practices—expressed in templates—or based on customer knowledge of their IT environment as described in “Conditional Computer Runtime Control of an Information Technology Environment Based on Pairing Constructs,” (POU920070110US1), Bobak et al., which is hereby incorporated herein by reference in its entirety. Pairing processing provides the mechanism for reflecting required or desired order of execution for operations, the impact of state change for one resource on another, the effect execution of an operation is expected to have on a resource state, desire to have one subsystem located on the same system as another and the effect an operation has on preparing the environment for availability management.

With preliminary definitions in place, a next activity of the BR administrator might be to define the goals for availability of the business application represented by a Recovery Segment as described in “Programmatic Validation in an Information Technology Environment,” (POU920070111US1), Bobak et al., which is hereby incorporated herein by reference in its entirety.

Managing the IT environment to meet availability goals includes having the BR system prioritize internal operations. The mechanism utilized to achieve the prioritization is described in “Serialization in Computer Management,” (POU920070105US1), Bobak et al., which is hereby incorporated herein by reference in its entirety.

Multiple operations are performed to prepare an IT environment to meet a business application's availability goal or to perform recovery when a failure occurs. The BR system creates workflows to achieve the required or desired ordering of operations, as described in “Dynamic Generation of Processes in Computing Environments,” (POU920070123US1), Bobak et al., which is hereby incorporated herein by reference in its entirety.

A next activity in achieving a BR environment might be execution of the ordered set of operations used to prepare the IT environment, as described in “Dynamic Selection of Actions in an Information Technology Environment,” (POU920070117US1), Bobak et al., which is hereby incorporated herein by reference in its entirety.

Management by BR to achieve availability goals may be initiated, which may initiate or continue monitoring of resources to detect changes in their operational state, as described in “Real-Time Information Technology Environments,” (POU920070120US1), Bobak et al., which is hereby incorporated herein by reference in its entirety. Monitoring of resources may have already been initiated as a result of “observation” mode processing.

Changes in resource or redundancy group state may result in impacting the availability of a business application represented by a Recovery Segment. Analysis of the environment following an error is performed. The analysis allows sufficient time for related errors to be reported, insures gathering of resource state completes in a timely manner and insures sufficient time is provided for building and executing the recovery operations—all within the recovery time goal, as described in “Management Based on Computer Dynamically Adjusted Discrete Phases of Event Correlation,” (POU920070119US1), Bobak et al., which is hereby incorporated herein by reference in its entirety.

A mechanism is provided for determining if events impacting the availability of the IT environment are related, and if so, aggregating the failures to optimally scope the outage, as described in “Management of Computer Events in a Computer Environment,” (POU920070118US1), Bobak et al., which is hereby incorporated herein by reference in its entirety.

Ideally, current resource state can be gathered after scoping of a failure. However, provisions are made to insure management to the availability goal is achievable in the presence of non-responsive components in the IT environment, as described in “Managing the Computer Collection of Information in an Information Technology Environment,” (POU920070121US1), Bobak et al., which is hereby incorporated herein by reference in its entirety.

With the outage scoped and current resource state evaluated, the BR environment can formulate an optimized recovery set of operations to meet the availability goal, as described in “Defining a Computer Recovery Process that Matches the Scope of Outage,” (POU920070124US1), Bobak et al., which is hereby incorporated herein by reference in its entirety.

Formulation of a recovery plan is to uphold customer specification regarding the impact recovery operations can have between different business applications, as described in “Managing Execution Within a Computing Environment,” (POU920070115US1), Bobak et al., which is hereby incorporated herein by reference in its entirety.

Varying levels of recovery capability exist with resources used to support a business application. Some resources possess the ability to perform detailed recovery actions while others do not. For resources capable of performing recovery operations, the BR system provides for delegation of recovery if the resource is not shared by two or more business applications, as described in “Conditional Actions Based on Runtime Conditions of a Computer System Environment,” (POU920070116US1), Bobak et al., which is hereby incorporated herein by reference in its entirety.

Having evaluated the outage and formulated a set of recovery operations, the BR system resumes monitoring for subsequent changes to the IT environment.

In support of mainline BR system operation, there are a number of activities including, for instance:

-   -   Coordination for administrative task that employ multiple steps,         as described in “Adaptive Computer Sequencing of Actions,”         (POU920070106US1), Bobak et al., which is hereby incorporated         herein by reference in its entirety.     -   Use of provided templates representing best practices in         defining the BR system, as described in “Defining and Using         Templates in Configuring Information Technology Environments,”         (POU920070109US1), Bobak et al., which is hereby incorporated         herein by reference in its entirety.     -   Use of provided templates in formulation of workflows, as         described in “Using Templates in a Computing Environment,”         (POU920070126US1), Bobak et al., which is hereby incorporated         herein by reference in its entirety.     -   Making changes to the availability goals while supporting         ongoing BR operation, as described in “Non-Disruptively Changing         a Computing Environment,” (POU920070122US1), Bobak et al., which         is hereby incorporated herein by reference in its entirety.     -   Making changes to the scope of a business application or         Recovery Segment, as described in “Non-Disruptively Changing         Scope of Computer Business Applications Based on Detected         Changes in Topology,” (POU920070125US1), Bobak et al., which is         hereby incorporated herein by reference in its entirety.     -   Detecting and recovery for the BR system is performed         non-disruptively, as described in “Managing Processing of a         Computing Environment During Failures of the Environment,”         (POU920070365US1), Bobak et al., which is hereby incorporated         herein in its entirety.

In order to build a BR environment that meets recovery time objectives, IT configurations within a customer's location are to be characterized and knowledge about the duration of execution for recovery time operations within those configurations is to be gained. IT configurations and the durations for operation execution vary by time, constituent resources, quantity and quality of application invocations, as examples. Customer environments vary widely in configuration of IT resources in support of business applications. Understanding the customer environment and the duration of operations within those environments aids in insuring a Recovery Time Objective is achievable and in building workflows to alter the customer configuration of IT resources in advance of a failure and/or when a failure occurs.

A characterization of IT configurations within a customer location is built by having knowledge of the key recovery time characteristics for individual resources (i.e., the resources that are part of the IT configuration being managed; also referred to as managed resources). Utilizing the representation for a resource, a set of key recovery time objective (RTO) metrics are specified by the resource owner. During ongoing operations, the BR manager gathers values for these key RTO metrics and gathers timings for the operations that are used to alter the configuration. It is expected that customers will run the BR function in “observation” mode prior to having provided a BR policy for availability management or other management. While executing in “observation” mode, the BR manager periodically gathers RTO metrics and operation execution durations from resource representations. The key RTO metrics properties, associated values and operation execution times are recorded in an Observation log for later analysis through tooling. Key RTO metrics and operation execution timings continue to be gathered during active BR policy management in order to maintain currency and iteratively refine data used to characterize customer IT configurations and operation timings within those configurations.

Examples of RTO properties and value range information by resource type are provided in the below table. It will be apparent to those skilled in the art that additional, less, and/or different resource types, properties and/or value ranges may be provided.

Resource Type Property Value Range Operating System Identifier Text State Ok, stopping, planned stop, stopped, starting, error, lost monitoring capability, unknown Memory Size Units in MB Number of systems in sysplex, if integer applicable Last IPL time of day Units in time of day/clock Type of last IPL Cold, warm, emergency Total Real Storage Available Units in MB GRS Star Mode Yes or No Complete IPL time to reach Units of elapsed time ‘available’ Total CPU using to reach Units of elapsed time available during IPL Total CPU delay to reach Units of elapsed time available during IPL Total Memory using to reach Units in MB available during IPL Total Memory delay to reach Units of elapsed time available during IPL Total i/o requests Integer value, number of requests Total i/o using to reach available Units of elapsed time during IPL Total i/o delay to reach available Units of elapsed time during IPL Computer System (LPAR, Identifier Text Server, etc.) State Ok, stopping, stopped, planned down, starting, error, lost monitoring capability, unknown Type of CPU - model, type, Text value serial Number of CPUs integer Number of shared processors integer Number of dedicated processors integer Last Activate Time of Day Units in time of day/clock Network Components Group of Network Connections Identity Operational State Ok, Starting, Disconnected, Stopping, Degraded, Unknown State of each associated Network Text Application Connection Performance Stats on loss and Complex delays Recovery Time for any Units in elapsed time associated application network connections Number of active application Integer network connections associated at time of network problem Stopped Time/duration for Units in elapsed time group of connectoins Maximum Network Recovery Units in elapsed time Time for any application connection in group Maximum Number of active Integer connections at time of network problem encountered, for any application connection in group Maximum Number of Integer connections processed at time of network recovery, for the group of connections Maximum network connection Units in elapsed time recovery time/duration for any application connection in the group Maximum Number of Integer connections dropped at time of application network connection recovery, for any application connection in the group Network Application Connection Identity Text State Ok, Stopping, Degraded, Error, Unknown Configuration Settings Complex Associated TCP/IP Parameter Text Settings Requirement Policies QoS or BR policies Performance Statistics, rules, Complex service class, number of active Network OS services State update Interval Units of elapsed time Last restart time of day Units in time of day/clock Last Restart Time/Duration Units in elapsed time Network Recovery Time for app Units in elapsed time connection Number of active connections at Integer time of network problem encountered, on a per app connection basis Number of connections Integer processed at time of network recovery, for the app connection application network connection Units in elapsed time recovery time/duration Number of connections at time of Integer application network connection problem encountered Number of connections Integer processed at time of application network connection recovery Number of connections dropped Integer at time of application network connection recovery Network Host Connection Identity Text State Ok, Stopping, Degraded, Error, Unknown Configuration Settings Complex Associated TCP/IP Parameter Text Settings Requirement Policies QoS or BR policies Performance Statistics, rules, Complex service class, number of active Network OS services State update Interval Units of elapsed time Last restart time of day Units in time of day/clock Last Restart Time/Duration Units in elapsed time Number of QoS Events, Integer indicating potential degradation Number of QoS Events handled, Integer Last handled QoS Event Text Database Subsystem Name, identifier Text Operational State Operational, Nonoperational, starting, stopping, in recovery, log suspended, backup initiated, restore initiated, restore complete, in checkpoint, checkpoint completed, applying log, backing out inflights, resolving indoubts, planned termination, lost monitoring capability Time spent in log apply Units of elapsed time Time spent during inflight Units of elapsed time processing Time spent during indoubt Units of elapsed time processing Total time to restart Units of elapsed time Checkpoint frequency Units of time Backout Duration Number of records to read back in log during restart processing CPU Used during Restart Units of elapsed time CPU Delay during Restart Units of elapsed time Memory Used during Restart Units in MB Memory Delay during Restart Units of elapsed time I/O Requests during restart Integer value of number of requests I/O using during restart Units of elapsed time I/O Delay during restart Units of elapsed time Database Datasharing Group Identifer Text Operational State Operational, nonoperational, degraded (some subset of members non operational), lost monitoring capability Number of locks in Shared Integer value Facility Time spent in lock cleanup for Elapsed time value last restart Database Identifier Text Tablespace Identifier Text Transaction Region Identifier Text Name Text Associated job name Text Maximum number of tasks/ Integer value threads Restart type for next restart Warm, cold, emergency Forward log name Text System log name Text Operational State Operational, nonoperational, in recovery, starting, stop normal first quiesce, stop normal second quiesce, stop normal third quiesce Time spent in log apply Units of elapsed time Time during each recovery stage Units of elapsed time Total time to restart Units of elapsed time CPU Used during Restart Units of elapsed time CPU Delay during Restart Units of elapsed time Memory Used during Restart Units in MB Memory Delay during Restart Units of elapsed time I/O Requests during restart Integer value of number of requests I/O connect time during restart Units of elapsed time I/O Delay during restart Units of elapsed time System Logsize Units in MB Forward Logsize Units in MB Activity Keypoint frequency Integer - number of writes before activity checkpoint taken Average Transaction Rate for Number of transactions per this region second, on average Transaction Group Group name Text Transaction Region File Filename Text Region Name Text Dataset Name Text Operational State Operational/enabled, nonoperational/disabled Open status Open, closed, closing Transaction Identifier Text Operational State Running, failed, shunted, retry in progress Region Name (s) that can run this Text transaction Program Name Text Logical Replication Group of Identity Text related datasets State Required currency characteristics Complex for datasets Required consistency Complex characteristics for datasets Replication Group Identity State Replication Session Identity State Established, in progress replication, replication successful complete Type of Session Flash copy, metro mirror, etc. Duration of last replication Units in elapsed time Time of Day for last replication Units in time of day/clock Amount of data replicated at last Units in MB replication Roleset Identity Text State CopySet Identity Text State Dataset Identity Text State Open, Closed Storage Group Identity Text State Storage Volume Identity Text State Online, offline, boxed, unknown Logical Storage Subsystem Identity Text State Storage Subsystem Identity Text State Subsystem I/O Velocity - ratio of time channels are being used Replication Link (Logical) Identity Text between Logical Subsystems State Operational, nonoperational, degraded redundancy Number of configured pipes Integer Number of operational pipes Integer

A specific example of key RTO properties for a z/OS® image is depicted in FIG. 8A. As shown, for a z/OS® image 800, the following properties are identified: GRS mode 802, CLPA? (i.e., Was the link pack area page space initialized?) 804, I/O bytes moved 806, real memory size 808, # CPs 810, CPU speed 812, and CPU delay 814, as examples.

The z/OS® image has a set of RTO metrics associated therewith, as described above. Other resources may also have its own set of metrics. An example of this is depicted in FIG. 8B, in which a Recovery Segment 820 is shown that includes a plurality of resources 822 a-m, each having its own set of metrics 824 a-m, as indicated by the shading.

Further, in one example, the RTO properties from each of the resources that are part of the Recovery Segment for App A have been gathered by BR and formed into an “observation” for recording to the Observation log, as depicted at 850.

Resources have varying degrees of functionality to support RTO goal policy. Such capacity is evaluated by BR, and expressed in resource property RTOGoalCapability in the BRMD entry for the resource. Two options for BR to receive information operation execution timings are: use of historical data or use of explicitly customer configured data. If BR relies on historical data to make recovery time projections, then before a statistically meaningful set of data is collected, this resource is not capable of supporting goal policy. A mix of resources can appear in a given RS—some have a set of observations that allow classification of the operation execution times, and others are explicitly configured by the customer.

Calculation of projected recovery time can be accomplished in two ways, depending on customer choice: use of historical observations or use of customers input timings. The following is an example of values for the RTOGoalCapability metadata that is found in the BRMD entry for the resource that indicates this choice:

UseHistoricalObservations The resource has a collection of statistically meaningful observations of recovery time, where definition of ‘statistically valid’ is provided on a resource basis, as default by BR, but tailorable by customers UseCustomerInputTimings The customer can explicitly set the operation timings for a resource

If the customer is in observation mode, then historical information is captured, regardless of whether the customer has indicated use of explicitly input timings or use of historical information.

The administrator can alter, on a resource basis, which set of timings BR is to use. The default is to use historical observations. In particular, a change source of resource timing logic is provided that alters the source that BR uses to retrieve resource timings. The two options for retrieving timings are from observed histories or explicitly from admin defined times for operation execution. The default uses information from the observed histories, gathered from periodic polls. If the customer defines times explicitly, the customer can direct BR to use those times for a given resource. If activated, observation mode continues and captures information, as well as running averages, and standard deviations. The impact to this logic is to alter the source of information for policy validation and formulation of recovery plan.

With respect to the historical observations, there may be a statistically meaningful set of observations to verify. The sample size should be large enough so that a time range for each operation execution can be calculated, with a sufficient confidence interval. The acceptable number of observations to qualify as statistically meaningful, and the desired confidence interval are customer configurable using BR UI, but provided as defaults in the BRMD entry for the resource. The default confidence interval is 95%, in one example.

There are metrics from a resource that are employed by BR to enable and perform goal management. These include, for instance:

Metric Qualification Last observed recovery/restart time In milliseconds; or alternately specifying units to use in calculations The key factors and associated Captured at last observed recovery time, and capturable values of the resource that affect at a point in time by BR recovery time The key factors and associated Captured at last observed recovery time, and capturable values of the resource that affect at a point in time by BR other dependent resources’ recovery times Observed time interval from ‘start’ If there are various points in the resource recovery state to each ‘non-blocking’ state lifecycle at which it becomes non-blocking to other resources which depend upon it, then: Observed time interval from ‘start’ state to each ‘non-blocking’ state Resource Consumption Information If the resource can provide information about its consumption, or the consumption of dependent resources, on an interval basis, then BR will use this information in forming PSEs and classifying timings. One example of this is: cpu, i/o, memory usage information that is available from zOS WLM for an aggregation of processes/address spaces over a given interval.

There is also a set of information about the resource that is employed—this information is provided as defaults in the BRMD entry for the resource, but provided to the BR team in the form of best practices information/defaults by the domain owners:

-   -   The operational state of the resource at which the observed         recovery time interval started.     -   The operational state of the resource at which the observed         recovery time interval ended.     -   The operational states of the resource at which point it can         unblock dependent resources (example: operational states at         which a DB2 could unblock new work from CICS, at which it could         allow processing of logs for transactions ongoing at time of         failure . . . ).     -   Values of statistical thresholds to indicate sufficient         observations for goal managing the resource (number of         observations, max standard deviations, confidence level).

In addition to the resources defined herein as part of the IT configuration that is managed, there are other resources, referred to herein as assessed resources. Assessed resources are present primarily to provide observation data for PSE formation, and to understand impact(s) on managed resources. They do not have a decomposed RTO associated with them nor are they acted on for availability by BR. Assessed resources have the following characteristics, as examples:

-   -   Are present to collect observation data for PSE formation.     -   Are present to understand impacts on managed resources.     -   No decomposed RTO is associated with an assessed resource.     -   They are resources on which resources managed by BR depend upon,         but are not directly acted on for availability by BR.     -   They are resources removed (or not explicitly added) from the         actively monitored set of resources by the BR admin during RS         definition.     -   They are resources that BR does not try to recover and BR thus         will not invoke any preparatory or recovery operations on them.

Similarly, there are likely scenarios where a resource exists in a customer environment that already has an alternative availability management solution, and does not require BR for its availability. However, since other resources that are managed by BR may be dependent on them, they are observed and assessed in order to collect observation data and understand their impacts on managed resources. Additionally, there may be resources that do not have alternative management solutions, but the customer simply does not want them managed by BR, but other managed resources are dependent upon them. They too are classified as assessed resources.

These assessed resources share many of the same characteristics of managed resources, such as, for example:

-   -   They have an entry in the BRMD, depending on their use, and the         BRMD entry has an indication of assessed vs. managed.     -   The RS subscribes to state change notifications for assessed         resources (and possibly other notifiable properties).     -   Relationships between observed and managed resources are         possible (and likely).     -   BR monitors for lifecycle events on assessed resources in the         same manner as for managed resources.     -   Assessed resources can be added and/or removed from Recovery         Segments.     -   They can be used to contribute to the aggregated state of an RS.

Finally, there are a few restrictions that BR imposes upon assessed resources, in this embodiment:

-   -   Again, BR does not invoke any workflow operations on assessed         resources.     -   A resource that is shared between two Recovery Segments is not         categorized as an assessed resource in one RS and a managed         resource in the other. It is one or the other in the RS's, but         not both.

To facilitate the building of the customer's IT configuration, observations regarding the customer's environment are gathered and stored in an observation log. In particular, the observation log is used to store observations gathered during runtime in customer environments, where each observation is a collection of various data points. They are created for each of the Recovery Segments that are in “observation” mode. These observations are used for numerous runtime and administrative purposes in the BR environment. As examples the observations are used:

-   -   To perform statistical analysis from the BR UI to form         characterizations of customers'normal execution environments,         represented in BR as Pattern System Environments (PSE).     -   To classify operations on resources into these PSEs for purposes         of determining operation execution duration.     -   Help determine approximate path length of operations that are         pushed down from BR to the resources, and possibly to the         underlying instrumentation of each resource.     -   Help determine approximate path length of activities executed         within BPEL workflows.     -   Finally, the data collected via the observation is also used to         update the metadata associated with the resource (i.e., in the         BRMD table) where appropriate.

BR gathers observations during runtime when “observation mode” is enabled at the Recovery Segment level. There are two means for enabling observation mode, as examples:

-   -   1. The BR UI allows the administrator to enable observation mode         at a Recovery Segment, which will change its “ObservationMode”         resource property to “True”, and to set the polling interval         (default=15 minutes). The Recovery Segment is defined in order         to allow observation mode, but a policy does not have to be         defined or activated for it.     -   2. Once a policy is defined though and subsequently activated,         observation mode is set for the Recovery Segment (due to the         data being used in managing and monitoring the customer's         environment). Thus, it is set automatically at policy         activation, if not already set explicitly by the administrator         (see 1 above) using the default polling interval (15 minutes).

The administrator may also disable observation mode for a Recovery Segment, which stops it from polling for data and creating subsequent observation records for insertion in the log. However, the accumulated observation log is not deleted. In one example, an RS remains in observation mode throughout its lifecycle. The UI displays the implications of disabling observation mode.

In BR, the observations that are collected by BR during runtime can be grouped into two categories, as examples:

-   -   1. Periodic poll.     -   2. Workflow (includes workflow begin/end, and workflow activity         begin/end).

A periodic poll observation is a point-in-time snapshot of the constituent resources in a Recovery Segment. Observation data points are collected for those resources in the Recovery Segment(s) which have associated BR management data for any of the following reasons, as examples:

-   -   1. Resource has RTO properties.     -   2. Resource has operations.     -   3. Resource participates in the aggregated state for the         Recovery Segment, in which it is contained.     -   4. Resource participates in any of the six types of pairing         rules.

The full value of these observations is derived for an RS when they include data that has been gathered for its constituent resources, plus the resources that those are dependent upon. In one embodiment, the administrator is not forced to include all dependent resources when defining a Recovery Segment, and even if that were the case, there is nothing that prevents them from deleting various dependent resources. When defining a Recovery Segment, the BR UI provides an option that allows the customer to display the dependency graph for those resources already in the Recovery Segment. This displays the topology from the seed node(s) in the Recovery Segment down to and including the dependent leaf nodes. The purpose of this capability is to give the customer the opportunity to display the dependent nodes and recommend that they be included in the Recovery Segment.

Preparatory and recovery workflows are built by the BR manager to achieve the customer requested RTO policy based on resource operations timings. During active policy monitoring by the BR manager, measurements of achieved time for operations are recorded in observations to the log and used to maintain the running statistical data on operation execution times. Observations written to the log may vary in the contained resource RTO metrics and operation execution timings.

Observations are also collected from any of the BPEL workflows created by BR in the customer's environment. There is a standard template that each BR BPEL workflow uses. As part of that template, observation data is captured at the start of, during, and at the completion of each workflow. Specifically, in one example, one observation is created at the end of the workflow with data accumulated from completion of each activity. This information is used to gather timings for workflow execution for use in creating subsequent workflows at time of failure.

In accordance with an aspect of the present invention, a capability is provided to facilitate management of an IT environment. In particular, resource graphs are provided that facilitate programmatic management of the environment, including, but not limited to, configuration thereof. The resource graphs include representations of resources of the environment and their interrelationships.

Deficiencies in Existing Capabilities

Management of IT environments today is generally configured either using fixed, predefined sets of resources, without any capture of resource relationships, or through the explicit configuration of relationships as part of a ‘policy’. In either case, the IT system is deficient in the following ways:

-   -   1. The information is static and needs to be updated explicitly         and manually.     -   2. Reconfiguration is potentially disruptive.     -   3. IT management technology cannot determine the actual runtime         impact of the effect actions taken on one or more resource(s)         will have on others.     -   4. IT management technology cannot determine the actual runtime         impact of the effect that change in resource state of one or         more resource(s) will have on others.     -   5. Changes to a collection of resources belonging to a resource         grouping are not done with transactional semantics, potentially         causing partially correct representations to be used by the IT         system.

Overview of Processing

In accordance with an aspect of the present invention, Resource Graphs are constructed and maintained for IT management. Described herein is the formation of Resource Graphs using IT resource and relationship information, enforcement of Resource Graphs as Directed Acyclic Graphs (DAGs) in one example, maintaining a DAG during changes to Resource Graphs, and associating resource, relationship changes to one or more specific Resource Graphs. Resources and their interrelationships can be represented in many ways, and in one implementation, as CIM resources (Common Information Model, DMTF).

Using Resource Graphs in the management of IT systems enables the relationship information to be captured and managed programmatically (i.e., without user intervention). Use of DAGs further facilitates dynamic changes to the environment to be associated with the right context(s), and handled in as least disruptive manner as possible, given the scope of the change.

Resource Graph Definitions, Enforcement of DAG

Resource Graphs can be created at various times during management of the IT environment. Once the set of resources and their interrelationships are defined, either via customer interaction in some cases, or programmatic formation of resource groupings in other cases, the resources and their interrelationships are evaluated for which other resources to include due to dependencies. After the dependencies are included, the proposed graph is evaluated as to whether it is a Directed Acyclic Graph via standard techniques. Techniques to verify whether a given graph is a DAG are well known in the art. Examples are described in, for instance, Gross, Jonathan L., Handbook of Graph Theory (Discrete Mathematics and Its Applications), ISBN-10: 1584880902, ISBN-13: 978-1584880905, CRC Press, 2003 and Gross, Jonathan L., Graph Theory and Its Applications, ISBN-10: 0849339820, ISBN-13: 978-0849339820, CRC Press, 1998, each of which is hereby incorporated herein in its entirety. Resource sharing across DAGs is possible, however, the DAG enforcement specifies that each graph is to be maintained as a DAG. (In other embodiments, graphs other than DAGs may be used.)

The enforcement of a DAG is performed both at time of initial build of the graph, as well as when any changes are introduced to the Resource Graph. Changes may occur because of alterations in relationships within the graph, or through additions of new relationships to existing members of the graph. The DAG enforcement is explicitly and programmatically performed, and changes that generate cyclic patterns are identified for customer resolution. In today's existing products, cyclic relationships are not identified in management of IT resources, nor is there resolution on how to handle such cyclic dependencies.

Changes to Resource Graphs for BR

There are a set of reasons why Resource Graphs may need to change. Changes may occur due to explicit customer reconfiguration for adding resources and/or relationships to or deleting resources and/or relationships from an IT environment. Further, customers may decide to reconfigure the definition of their business applications by adding/removing resources or relationships (e.g., business applications being represented by a Recovery Segment, RS). In other cases, dynamic construction of a DAG for representation of resources may need to change, such as that used to represent collections of resources and resource data associated with a common failure point (e.g., a Containment Region, in one implementation). In the first two cases where there is explicit modification of either the IT environment or the representation of a business application, a revised proposed Resource Graph is generated based on the change and based on any related resources that also need to be affected. The proposed Resource Graph is verified and enforced to be a DAG, as well. Previous and proposed Resource Graphs are maintained until the changed process is completed. In this way, changes to the IT environment and representations of business applications are dynamically detected, associated with the relevant DAGs, and each of the effected DAGs is reconciled with the set of changes.

Transactional Semantics During Multiple Changes to Resource Graph

In one example, changes where multiple resources and/or relationships are added/deleted from a Resource Graph are handled in a given transactional scope. In one implementation, customer initiated changes are processed as a set, with a response that is the ‘proposed resource graph’. The ‘proposed resource graph’ includes assessment of the changes and includes the related dependencies. Once approved, this change is initiated with transactional semantics, and the changes to the DAG(s) are processed under the scope of the transaction.

Extensibility of Resource Graphs

In one embodiment, the Resource Graph implementation described herein is not reliant upon any one specific representation of resources or relationships. The representation of resources as DAG vertices and the representation of relationships as DAG edges is extensible to inclusion of resource and relationship specifications from any vendors.

Examples of Resource Graph Use

Examples of DAG use in an IT management system are as follows; although the invention is not limited to these examples:

-   -   Representing a set of resources and relationships belonging to         each business application as a separate DAG, which may have         vertices in common with other DAGs representing other business         applications.     -   Representing a set of redundant resources and interrelationships         between these resources as a DAG.     -   Representing the scope of impact of an outage, based on the         effected resources and their interrelationships.     -   Representing the set of resource and relationship types that         form a given IT environment template which can then be used to         pattern match across the IT environment, identifying specific         resource instances of the given DAG pattern.

Build DAG

One embodiment of the logic to create a resource graph is described with reference to FIG. 9. In the example described herein, the resource graph is a Directed Acyclic Graph (DAG). However, this is only one example.

In one implementation, this logic is invoked in numerous ways to create a new Directed Acyclic Graph (DAG) that represents a set of IT resources and the relationships between those IT resources. In one example, it may be invoked by the BR Administrator from the Eclipse-based BR UI to define a Recovery Segment, as described in “Recovery Segments For Computer Business Applications,” (POU920070108US1), Bobak et al., which is hereby incorporated herein by reference in its entirety. In another example, it may be created dynamically and programmatically by IT management processing, such as one that builds a Containment Region for scope of impact of outage, as described in “Management of Computer Events in a Computer Environment,” (POU920070118US1), Bobak et al., which is hereby incorporated herein by reference in its entirety. As one example, the BRM component of the BR system performs this logic.

The inputs to this routine include a set of IT resources and a set relationships between those IT resources. Each IT resource is represented as a vertex in the DAG, and each relationship is represented as a directed edge in the DAG, with the first resource in the relationship being the source vertex and the second resource in the relationship being the destination vertex.

For illustration purposes, these terms are utilized in this logic to denote the inputs and outputs to and from this routine:

-   -   A set of resources to be denoted RES.     -   A set of relationships to be denoted as REL, where each         relationship includes:         -   1. Source-Resource;         -   2. Relationship type; and         -   3. Destination-Resource.     -   The newly created DAG to be denoted as DAG.     -   Referring to FIG. 9, initially, the data structure for the DAG         to be created and returned is allocated, STEP 900. The data         structure for the DAG is implementation specific, and may         include, for example, a table including N rows each of three         columns—a column identifying the edge, a column identifying the         source vertex, a column identifying the target vertex; a linked         list of elements, in which each element is a triad of data         composed of identification of the edge, the source vertex, the         destination vertex; and/or form a key from a hash of the         representation of the two vertices and their linking         relationship where the key is obtainable from a binary tree         search and points to a random access data table including one         row for each triad of data.     -   Iterate for each resource in RES, STEP 902.         -   Check to see if the resource already exists in the DAG,             INQUIRY 904.             -   If Yes, iterate, STEP 902.             -   If No, add the resource as a vertex to the DAG, STEP                 906, and iterate, STEP 902.     -   After all the resources in RES are processed, the flow iterates         for each of the relationships in REL, STEP 908.         -   Check to see if the relationship already exists in the DAG,             INQUIRY 910.             -   If Yes, iterate, STEP 908.             -   If No, check to ensure that both the Source-Resource and                 the Destination-Resource on the relationship exist as                 resources in the DAG, INQUIRY 912.                 -   If No, add the resource(s) not found as vertices to                     the DAG, STEP 914.             -   Thereafter, or if the Source-Resource and                 Destination-Resource exist, check to see if the addition                 of the relationship introduces a cycle (i.e., an edge                 which connects to a previously visited vertex), INQUIRY                 916.             -   If No, add the relationship as a directed edge to the                 DAG, STEP 918, and iterate, STEP 908.             -   If Yes, set the return code(RC) to indicate a cycle                 error, STEP 920, return the relationship that would                 cause the cycle to the caller, STEP 922, and processing                 completes.     -   After all the relationships in REL are processed, the logic         returns the newly created DAG, STEP 924, and processing         completes.

Modify DAG Flow

One embodiment of the logic to modify a resource graph (e.g., a DAG) is described with reference to FIGS. 10A-10C. This logic is invoked in numerous ways to modify an existing Directed Acyclic Graph (DAG) that represents a set of IT resources and the relationships between those IT resources. In one example, it may be invoked by the BR Administrator from the Eclipse-based BR UI to modify a Recovery Segment. In another example, it may be modified dynamically and programmatically by IT management processing, such as one that builds a collection of resources and relationship associated with a common outage (a Containment Region, in one implementation) for scope of impact of outage. As an example, this logic is performed by the BRM.

The inputs to this routine include the DAG to be modified, a set of IT resources to add or delete and/or a set of relationships to add or delete. Each IT resource is represented as a vertex in the DAG and each relationship is represented as a directed edge in the DAG, with the first resource in the relationship being the source vertex and the second resource in the relationship being the destination vertex.

-   -   For illustration purposes, these terms are utilized in this         logic to denote the inputs and outputs to this routine:         -   The original DAG to modify to be denoted as DAG-Org.         -   The modified DAG to be denoted as DAG.         -   A set of resources to add to be denoted RES-Add.         -   A set of resources to delete to be denoted as RES-Del.         -   A set of relationships to add to be denoted by REL-Add.         -   A set of relationships to delete to be denoted by REL-Del.         -   Where each set of relationships includes:             -   1. Source-Resource;             -   2. Relationship type; and             -   3. Destination-Resource.     -   Referring to FIG. 10A, the data structure for the DAG in its         modified form, which will be returned upon successful completion         of this routine, is allocated and set to the original DAG-Org,         STEP 1000. The data structure for the DAG is implementation         specific.     -   Iterate for each resource to add in RES-Add, STEP 1002.         -   Check to see if the resource already exists in the DAG,             INQUIRY 1004.             -   If Yes, iterate, STEP 1002.             -   If No, add the resource as a vertex to the DAG, STEP                 1006, and iterate, STEP 1002.     -   After all the resources in RES are processed, the logic iterates         for each resource to delete in RES-Del, STEP 1008.         -   Check to see if the resource already exists in the DAG,             INQUIRY 1010.         -   If No, iterate, STEP 1008.         -   If Yes:             -   Delete the resource vertex from the DAG, STEP 1012.             -   For all the relationships for which the resource is the                 Source-Resource or Destination-Resource in DAG-Org, STEP                 1014, delete that relationship directed edge from the                 DAG, STEP 1016, then iterate, STEP 1008.     -   After all the resources to delete in RES-Del are processed, the         logic iterates for each of the relationships to add in REL-Add,         STEP 1018 (FIG. 10B).         -   Check to see if the relationship already exists in the DAG,             INQUIRY 1020.             -   If Yes, iterate, STEP 1018.             -   If No, check to ensure that both the Source-Resource and                 the Destination-Resource on the relationship exists as                 resources in the DAG, INQUIRY 1022.                 -   If No, check to ensure the resource(s) were not                     previously deleted (i.e., in RES-Del), INQUIRY 1024.                 -    If No, add the resource(s) not found as vertices to                     the DAG, STEP 1026.                 -    If Yes, set the RC to indicate a relationship                     error, STEP 1028, return the relationship that would                     cause the error to the caller, STEP 1030, and                     processing completes.             -   Returning to INQUIRY 1022, if yes or after adding the                 missing resource, STEP 1026, check to see if the                 addition of the relationship introduces a cycle, INQUIRY                 1032.                 -   If No, add the relationship as a directed edge to                     the DAG, STEP 1034, and iterate, STEP 1018.                 -   If Yes, set the RC to indicate a cycle error, STEP                     1036, return the relationship that would cause the                     cycle to the caller, STEP 1038, and processing                     completes.     -   After all the relationships to add in REL-Add are processed, the         logic iterates for each of the relationships to delete in         REL-Del, STEP 1040 (FIG. 10C).         -   Check to see if the relationship exists in the DAG, INQUIRY             1042.             -   If No, iterate, STEP 1040.             -   If Yes, delete the relationship directed edge from the                 DAG, STEP 1044, and iterate, STEP 1040.     -   After all the relationships to delete in REL-Del are processed,         the logic returns the modified DAG, STEP 1046, and processing         completes.

Described in detail herein is a capability for providing a resource graph to be used in managing an IT environment.

One or more aspects of the present invention can be included in an article of manufacture (e.g., one or more computer program products) having, for instance, computer usable media. The media has therein, for instance, computer readable program code means or logic (e.g., instructions, code, commands, etc.) to provide and facilitate the capabilities of the present invention. The article of manufacture can be included as a part of a computer system or sold separately.

One example of an article of manufacture or a computer program product incorporating one or more aspects of the present invention is described with reference to FIG. 11. A computer program product 1100 includes, for instance, one or more computer usable media 1102 to store computer readable program code means or logic 1104 thereon to provide and facilitate one or more aspects of the present invention. The medium can be an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system (or apparatus or device) or a propagation medium. Examples of a computer readable medium include a semiconductor or solid state memory, magnetic tape, a removable computer diskette, a random access memory (RAM), a read-only memory (ROM), a rigid magnetic disk and an optical disk. Examples of optical disks include compact disk-read only memory (CD-ROM), compact disk-read/write (CD-R/W) and DVD.

A sequence of program instructions or a logical assembly of one or more interrelated modules defined by one or more computer readable program code means or logic direct the performance of one or more aspects of the present invention.

Advantageously, a capability is provided for creating, modifying and using resource graphs in managing IT environments. The graphs enable programmatic management, which is dynamic and reflects the current state of the environment.

Although various embodiments are described above, these are only examples. For example, the processing environments described herein are only examples of environments that may incorporate and use one or more aspects of the present invention. Environments may include other types of processing units or servers or the components in each processing environment may be different than described herein. Each processing environment may include additional, less and/or different components than described herein. Further, the types of central processing units and/or operating systems or other types of components may be different than described herein. Again, these are only provided as examples.

Moreover, an environment may include an emulator (e.g., software or other emulation mechanisms), in which a particular architecture or subset thereof is emulated. In such an environment, one or more emulation functions of the emulator can implement one or more aspects of the present invention, even though a computer executing the emulator may have a different architecture than the capabilities being emulated. As one example, in emulation mode, the specific instruction or operation being emulated is decoded, and an appropriate emulation function is built to implement the individual instruction or operation.

In an emulation environment, a host computer includes, for instance, a memory to store instructions and data; an instruction fetch unit to obtain instructions from memory and to optionally, provide local buffering for the obtained instruction; an instruction decode unit to receive the instruction fetched and to determine the type of instructions that have been fetched; and an instruction execution unit to execute the instructions. Execution may include loading data into a register for memory; storing data back to memory from a register; or performing some type of arithmetic or logical operation, as determined by the decode unit. In one example, each unit is implemented in software. For instance, the operations being performed by the units are implemented as one or more subroutines within emulator software.

Further, a data processing system suitable for storing and/or executing program code is usable that includes at least one processor coupled directly or indirectly to memory elements through a system bus. The memory elements include, for instance, local memory employed during actual execution of the program code, bulk storage, and cache memory which provide temporary storage of at least some program code in order to reduce the number of times code must be retrieved from bulk storage during execution.

Input/Output or I/O devices (including, but not limited to, keyboards, displays, pointing devices, DASD, tape, CDs, DVDs, thumb drives and other memory media, etc.) can be coupled to the system either directly or through intervening I/O controllers. Network adapters may also be coupled to the system to enable the data processing system to become coupled to other data processing systems or remote printers or storage devices through intervening private or public networks. Modems, cable modems, and Ethernet cards are just a few of the available types of network adapters.

Further, although the environments described herein are related to the management of availability of a customer's environment, one or more aspects of the present invention may be used to manage aspects other than or in addition to availability. Further, one or more aspects of the present invention can be used in environments other than a business resiliency environment.

Yet further, many examples are provided herein, and these examples may be revised without departing from the spirit of the present invention. For example, in one embodiment, the description is described in terms of availability and recovery; however, other goals and/or objectives may be specified in lieu of or in addition thereto. Additionally, the resources may be other than IT resources. Further, there may be references to particular products offered by International Business Machines Corporation or other companies. These again are only offered as examples, and other products may also be used. Additionally, although tables and databases are described herein, any suitable data structure may be used. There are many other variations that can be included in the description described herein and all of these variations are considered a part of the claimed invention.

Further, for completeness in describing one example of an environment in which one or more aspects of the present invention may be utilized, certain components and/or information is described that is not needed for one or more aspects of the present invention. These are not meant to limit the aspects of the present invention in any way.

One or more aspects of the present invention can be provided, offered, deployed, managed, serviced, etc. by a service provider who offers management of customer environments. For instance, the service provider can create, maintain, support, etc. computer code and/or a computer infrastructure that performs one or more aspects of the present invention for one or more customers. In return, the service provider can receive payment from the customer under a subscription and/or fee agreement, as examples. Additionally or alternatively, the service provider can receive payment from the sale of advertising content to one or more third parties.

In one aspect of the present invention, an application can be deployed for performing one or more aspects of the present invention. As one example, the deploying of an application comprises providing computer infrastructure operable to perform one or more aspects of the present invention.

As a further aspect of the present invention, a computing infrastructure can be deployed comprising integrating computer readable code into a computing system, in which the code in combination with the computing system is capable of performing one or more aspects of the present invention.

As yet a further aspect of the present invention, a process for integrating computing infrastructure, comprising integrating computer readable code into a computer system may be provided. The computer system comprises a computer usable medium, in which the computer usable medium comprises one or more aspects of the present invention. The code in combination with the computer system is capable of performing one or more aspects of the present invention.

The capabilities of one or more aspects of the present invention can be implemented in software, firmware, hardware, or some combination thereof. At least one program storage device readable by a machine embodying at least one program of instructions executable by the machine to perform the capabilities of the present invention can be provided.

The flow diagrams depicted herein are just examples. There may be many variations to these diagrams or the steps (or operations) described therein without departing from the spirit of the invention. For instance, the steps may be performed in a differing order, or steps may be added, deleted, or modified. All of these variations are considered a part of the claimed invention.

Although embodiments have been depicted and described in detail herein, it will be apparent to those skilled in the relevant art that various modifications, additions, substitutions and the like can be made without departing from the spirit of the invention and these are therefore considered to be within the scope of the invention as defined in the following claims. 

1. A computer-implemented method of facilitating management of an Information Technology (IT) environment, said method comprising: providing a resource graph for an IT environment, the resource graph comprising representations of one or more resources of the IT environment and their interrelationships; and using the resource graph to manage one or more aspects of the IT environment.
 2. The computer-implemented method of claim 1, wherein the resource graph is a directed acyclic graph.
 3. The computer-implemented method of claim 1, wherein the providing comprises programmatically creating the resource graph based on a current state of the IT environment.
 4. The computer-implemented method of claim 3, wherein the creating comprises: determining whether an addition of a relationship to the resource graph introduces a cycle in the resource graph; and adding the relationship, in response to the determining indicating that the adding does not introduce the cycle.
 5. The computer-implemented method of claim 1, further comprising modifying the resource graph based on a current state of the IT environment.
 6. The computer-implemented method of claim 5, wherein the modifying comprises dynamically updating the resource graph, in response to an addition or deletion of a resource in the IT environment.
 7. The computer-implemented method of claim 5, wherein the modifying comprises dynamically updating the resource graph, in response to an addition, deletion, or change of a relationship of the IT environment.
 8. The computer-implemented method of claim 5, wherein the modifying comprises making a plurality of changes to the resource graph, wherein the plurality of changes is performed via a transaction.
 9. The computer-implemented method of claim 5, wherein the modifying comprises: determining whether the modification introduces a cycle in the resource graph; and performing the modification, in response to the determining indicating that the modification does not introduce the cycle.
 10. The computer-implemented method of claim 1, wherein a plurality of resource graphs is provided, and wherein the method further comprises enforcing the plurality of resource graphs for a plurality of resource groupings used to manage the IT environment.
 11. The computer-implemented method of claim 10, wherein the plurality of resource groupings include one or more of: a resource group representing one or more business applications; a resource group representing one or more redundancy groups; a resource group representing a set of resources affected by a failure; and a resource group representing a template of resources and relationships.
 12. The computer-implemented method of claim 1, wherein the representation of resources are verticies of the resource graph and the representation of interrelationships are edges of the resource graph.
 13. A system to facilitate management of an Information Technology (IT) environment, said system comprising: a memory including a resource graph for an IT environment, the resource graph comprising representations of one or more resources of the IT environment and their interrelationships; and at least one computing component to use the resource graph to manage one or more aspects of the IT environment.
 14. The system of claim 13, wherein the resource graph is a directed acyclic graph.
 15. The system method of claim 13, further comprising at least one computing component to programmatically create the resource graph based on a current state of the IT environment.
 16. The system method of claim 13, further comprising at least one computing component to modify the resource graph based on a current state of the IT environment.
 17. An article of manufacture comprising: at least one computer usable medium having computer readable program code logic to facilitate management of an Information Technology (IT) environment, said method comprising: providing a resource graph for an IT environment, the resource graph comprising representations of one or more resources of the IT environment and their interrelationships; and using the resource graph to manage one or more aspects of the IT environment.
 18. The article of manufacture of claim 17, wherein the resource graph is a directed acyclic graph.
 19. The article of manufacture of claim 17, wherein the providing comprises programmatically creating the resource graph based on a current state of the IT environment.
 20. The article of manufacture of claim 17, further comprising modifying the resource graph based on a current state of the IT environment. 